Alexander siemens



No. 608,!37. Patented July 26, I898.

, A. SlEMENS. ELECTROMOTOR FOR ELECTRICALLY PROPELLED VEHICLES.

(Application filed Nov. 18, 18 97.)

(No Model.)

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UNITED STATES PATENT OFFICE.

ALEXANDER SIEMENS, OF LONDON, ENGLAND, ASSIGNOR TO SIEMENS BROTHERS & 00., LIMITED, OF SAME PLACE.

ELECTROMOTOR FOR ELECTRlCALLY-PROPELLED VEHICLES.

SPECIFICATION forming part of Letters Patent No. 608,137, dated July 26, 1898.

Application filedNovem'ber 18, 1897. Serial No- 658,969. (No model.) Patented in England January 27, 1892, No. 1,641.

To (LZZ whom it may concern.-

Beit known that I, ALEXANDER SIEMENs, civil engineer, a citizen of England, residing at 12 Queen Annes Gate, Vestminster, London, in the county of Middlesex, England, have invented new and useful Improvements in Electromotors for Electrically-Propelled Vehicles, (for which I have obtained Letters Patent in Great Britain, No. 1,611, dated Janu ary 27, 1892,) of which the following is a specification.

In electromotors for electrically-propelled vehicles in which the armature is almost entirely surrounded by the curved pole-pieces of the field-magnets there is great difiiculty, more particularly when the motor is of a large size, in gaining access to the armature or in removing it. My present invention has for its object to obviate this disadvantage by arranging the pole-pieces partially separate from the limbs of the fielcbmagnets and so that they can be removed in order to gain access to the armature and to facilitate its removal. For this purpose I make each polepiece in two separate parts, the one part rigidly fixed to the field-magnet or forming part of it and the other part jointed to the fixed part by a hinge, so that when required it can be turned back upon its hinge-joint, and thus leave half of the armature exposed.

For securing the hinged parts in their working position surrounding the armature they may have screw-bolts passing through them into the fixed parts or they may be secured by other suitable fastenings.

lVhen the armature is fixed directly on the axle of the running-wheels, while the fieldmagnets are fixed to the framing of the vehicle, the opening formed by the curved polepieees may be made slightly oval or elongated in the vertical direction, so as to allow a certain amount of vertical play of the armature between them.

The accompanying drawing is a side View of part of an electric locomotive having the armature A of the motor fixed on the driving-axle.

F F is the field-magnet, having the upper parts P P of the pole-pieces intregal with its cores; but the lower parts 1) p are made separate and are hinged at Q Q, being, when in working position, fastened to P P by screws S S or otherwise.

On undoing the fastenings the parts 131) can be turned down on their hinges, as indicated by the dotted lines, giving access to the armature A, which, along with the axle and driving-wheels, can be removed through the gap left open below.

Having thus described the nature of this invention and the best means I know for carrying the same into practical eifeet I claim- In an electromotor for propelling avehicle, the combination with the axle having an armature secured thereon and rotating therewith, of field-magnets located above said armature, pole-pieces depending from said field-magnets and partly surrounding the armature and extending in a plane at right angles thereto, said pole-pieces being formed in two parts having a hinged connection, whereby the lower portions thereof may be swung back to permit the body of the vehicle, with the magnets, to be raised off of the armature, and means for securing the two parts of the pole-pieces in fixed relation to each other, substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 29th day of October, A. D. 1897.

ALEXANDER SIEMENS. Witnesses:

EDMUND S. SNEWIN, WM. 0. BROWN. 

